I've not seen that error before, and we run that version of XenServer 
internally.  Doing a Google search for that error message (minus the "CentOS" 
parts) brought up a couple of suggestions of places to look.  You may just want 
to do a quick sanity-check of those suggestions first.  If that doesn't get you 
anywhere, can you run the following commands and post the results?

        xe pif-list params=all
        xe network-list params=all
        xe vif-list params=all
        ifconfig -a

Are you using the spec file in the "xenserver" directory to build your own RPM? 
 If not, are you still using the scripts located in that directory?

--Justin


On Feb 14, 2010, at 11:37 PM, [email protected] wrote:

> After removing vswitch VM does come up properly.
> Xen kernel version is 2.6.18-128.1.6.el5.xs5.5.0.505.1024xen.
> Guest OS is Cent OS 5.0.
>  
> Related to this issue
> With Open vSwitch running on Xen Server, If I try to create new VM with 
> single interface, Add VM failed with following error.
> Error: Creating 'CentOS 5.3 ' by cloning 'CentOS 5.3' - This VM cannot be 
> started, as its network interfaces could not be connected.  One of the NICs 
> is in use elsewhere.
>  
> Thanks,
> DV
>  
> -----Original Message-----
> From: Justin Pettit <[email protected]>
> To: [email protected]
> Cc: [email protected]
> Sent: Mon, 15 Feb 2010 12:25 pm
> Subject: Re: [ovs-discuss] VM doesn't power on after open vswitch installation
> 
> I've never seen anything like that.  If you remove Open vSwitch, does it work 
> again?
> 
> What hypervisor are you using?  What guest OS are you using?
> 
> --Justin
> 
> 
> 
> On Feb 14, 2010, at 10:50 PM, 
> [email protected]
>  wrote:
> 
> > Hi,
> >  
> > I have installed open vswitch version 0.99.1.
> > After post installation reboot, VMs having network interface doesn't come 
> > up 
> (power on). Once I delete VM network interface, it comes up successfully.
> > Is this issue related to open vswitch or  am I missing any configuration 
> > for 
> VM before open vswitch installation.
> >  
> > Thanks,
> > DV
> > _______________________________________________
> > discuss mailing list
> > 
> [email protected]
> 
> > 
> http://openvswitch.org/mailman/listinfo/discuss_openvswitch.org


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